Note 1820 — Scene III. A royal Palace.
Reading edition
The Duke of Yorke knocks at the doore and cryeth. Q1 Q2 Q3 Q4 (knokes Q1). Yorke within. Ff (at line 38).
beware ... thy self] lock to thyself; beware; Anon. conj.
thyself] thyself, my liege Capell.